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"UNDER SIDE" stamp on 4" blank plate?

A question for the know-it-alls. Why do 4" electrical blank plates have a stamp that reads "UNDER SIDE" on one side? My obsessive nature will not allow this rule to be ignored even if it seems meaningless which side is exposed.

It is so when you tighten the screws to hold the cover on, they pull the cover against them, not push it away. Same theory when you put wire under a screw and tighten it. Always wrap the screw in the direction of tightening.

It is so when you tighten the screws to hold the cover on, they pull the cover against them, not push it away. Same theory when you put wire under a screw and tighten it. Always wrap the screw in the direction of tightening.

Beat me to it. I was trying to find literature to help prove that to the know it alls.

It is so when you tighten the screws to hold the cover on, they pull the cover against them, not push it away. Same theory when you put wire under a screw and tighten it. Always wrap the screw in the direction of tightening.

Sorry bud, that was among my first ideas too, however if you go out to the truck and check it, you can install it in any position from either side. It also follows that when one screw "pulls it on", like a wire, the other is opposite.

Sorry bud, that was among my first ideas too, however if you go out to the truck and check it, you can install it in any position from either side. It also follows that when one screw "pulls it on", like a wire, the other is opposite.

Uh, the slot that looks like a hook points counter clock wise when it is backwards and when you tighten the screw it tries to push the plate off of the slot, when it is correct it points clockwise and tightening the screw draws the cover tighter towards the screw. Depending on your locality you can fail electrical if these are wrong. If you have a different plate from what we are talking about take a picture

I think that I found the plate that you are talking about.www.grainger.com/Grainger/items/5A053
I have no idea if this is stamped like the ones you are talking about but the only reason that I could think of (make up) would be that the corrosion resistive properties are not the same for both sides, but again that is a total blind guess.